一种基于机器视觉检测受电弓升降弓时间及弓头位移曲线的新方法

A New Method for Detecting Pantograph Lifting Time and Pantograph-head Displacement Curve Based on Machine Vision

铁路列车受电弓的升降弓时间和升降弓位移曲线是判断受电弓状态的重要参考指标。基于机器视觉和图像处理技术设计一种非接触式检测受电弓升降弓时间和弓头位移曲线的方法。在受电弓转臂节点处以及平衡杆上添加标记点,用于图像的跟踪和检测;利用高速工业相机拍摄受电弓的升降弓过程图片;对受电弓标记点进行粗定位,识别标记点大致区域;基于模板匹配方法在此区域内进行目标跟踪和特征提取,得到标记点的具体位置信息,从而得到升降弓弓头位移曲线和升降弓时长。通过试验证明了该方法的有效性。

The time and displacement curve of the trainpantograph are important reference indicators for judging the states of the pantograph. Based on machine vision and image processing technology, a method for non-contact detection of the pantograph lifting time and pantograph-head displacement curve was designed. Mark points were added at the tumbler node of the pantograph and on balance bar for images tracking and detecting. The pictures of the pantograph were taken by high-speed industrial cameras. The pantograph marking points were roughly located to identify the approximate area of the marking points, within which target tracking and feature extraction were performed by template matching method to abtain the specific location information of the marker points. Thus, the pantograph-head displacement curve and the pantograph lifting time were calculated. The effectiveness of he new method was verified through experiments.